Question

which of the following is not a valid variable name in python? justify reason for it not being a valid name.​

Answer 1

Answer:

The answer is 5Radius

Explanation:

• It is because:
• A Valid identifier in Python doesn't start with a number.
• Once can use underscore anywhere.
• An identifier in Python can contain small case letters (a-z), upper case letters (A-Z), digits (0-9), and underscore (_).
• An identifier can't only contain digits.
• the name of the identifier in Python is case sensitive.  
• so, the correct identifier is:  5Radius